DTC 12-4x

DTC 12-1x ("x" can be 0 thru 9 or A thru F): Open in Front Passenger's Airbag First Inflator

DTC 12-4x ("x" can be 0 thru 9 or A thru F): Open in Front Passenger's Airbag Second Inflator

Special Tools Required
- SRS inflator simulator 07SAZ-TB4011A
- SRS simulator lead F 07XAZ-SZ30100

NOTE: Before doing this troubleshooting procedure, review SRS Precautions and Procedures and General Troubleshooting Information.

1. Clear the DTC memory.
2. Turn the ignition switch ON (II), and check that the SRS indicator comes on for about 6 seconds and then goes off.

Does the SRS indicator stay on, and is DTC 12-1x or 12-4x indicated?

YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures. Troubleshooting Intermittent Failures If another DTC is indicated, troubleshoot the DTC.

3. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.
4. Disconnect the front passenger's airbag 4P connector (A) from dashboard wire harness A.






5. Connect the SRS inflator simulator (2 ohms connectors) and simulator lead F to the dashboard wire harness A 4P connector.
6. Reconnect the negative cable to the battery.
7. Clear the DTC memory.
8. Check for a DTC.

Is DTC 12-1x or 12-4x indicated?

YES - Go to step 9.

NO - Open in the front passenger's airbag first or second inflator; replace the front passenger's airbag.

9. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.
10. Disconnect SRS unit connector A (28P) from the SRS unit.
11. Disconnect the SRS Inflator simulator from SRS simulator lead. Do not disconnect the simulator lead from the dashboard wire harness A 4P connector.
12. Measure the resistance between the terminals of both SRS simulator leads. There should be less than 1 ohm.






Is the resistance as specified?

YES - Faulty SRS unit or poor connection at SRS unit connector A (28P). Check the connection; if the connection is OK, replace the SRS unit.

NO - Go to step 13.

13. Disconnect SRS subharness 28P connector C821 (B) from dashboard wire harness A connector C821.






14. Measure the resistance between the No.1 and the No.2 terminals and between the No.7 and the No.8 terminals of SRS subharness 28P connector C821. There should be less than 1 ohm.






Is the resistance as specified?

YES - Open in dashboard wire harness A; replace dashboard wire harness A.

NO - Open in the SRS subharness; replace the SRS subharness.